import geopy.distance


def direct_distance(row: dict) -> float:
    """Direct distance between two points.

    Args:
        row (dict): Dictionary with from_lat/lon, to_lat/lon fields.

    Returns:
        float: Distance in km.
    """
    return geopy.distance.geodesic(
        (row["from_lat"], row["from_lon"]),
        (row["to_lat"], row["to_lon"])
    ).km